<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <!-- 引入 vue.js 文件 -->
    <script src="../js/vue.js"></script>
</head>

<body>

    <div id="app">
        <cpn :number1="num1" :number2="num2" @num1change="num1change" @num2change="num2change"></cpn>
    </div>

    <template id="cpn">
        <div>
            <h2>props:{{number1}}</h2>
            <h2>data:{{dnumber1}}</h2>
            <!-- <input type="text" v-model="dnumber1"> -->
            <input type="text" :value="dnumber1" @input="num1Input">
            <h2>props:{{number2}}</h2>
            <h2>data:{{dnumber2}}</h2>
            <!-- <input type="text" v-model="dnumber2"> -->
            <input type="text" :value="dnumber2" @input="num2Input">
        </div>
    </template>

    <script>
        new Vue({
            el: "#app",
            data: {
                num1: 1,
                num2: 0
            },
            methods: {
                // 通过事件接收子组件的数据
                num1change(value) {
                    this.num1 = parseInt(value);
                },
                num2change(value) {
                    this.num2 = parseInt(value);
                }
            },


            // 子组件
            components: {
                cpn: {
                    template: '#cpn',
                    // 父组件传递数据给子组件
                    props: {
                        number1: Number,
                        number2: Number,
                    },
                    data() {
                        return {
                            dnumber1: this.number1,
                            dnumber2: this.number2
                        }
                    },
                    methods: {
                        num1Input(event) {
                            this.dnumber1 = event.target.value;
                            // 发送数据给父组件
                            this.$emit('num1change', this.dnumber1);
                        },
                        num2Input(event) {
                            this.dnumber2 = event.target.value;
                            // 发送数据给父组件
                            this.$emit('num2change', this.dnumber2);
                        }
                    }
                },
            }
        });
    </script>
</body>

</html>